SOLUTION: In a survey, 40% of Americans said they owned an answering machine. If 10 Americans are selected at random, find the probability that exactly 8 own an answering machine.

SOLUTION: In a survey, 40% of Americans said they owned an answering machine. If 10 Americans are selected at random, find the probability that exactly 8 own an answering machine.

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Question 976009: In a survey, 40% of Americans said they owned an answering machine. If 10 Americans are selected at random, find the probability that exactly 8 own an answering machine.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Expected value would be 4, so probability will be low. Binomial problem
10C8 (0.4)^8 (0.6)^2 = 45 *(0.000655)(0.36)=0.0106

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